Refrigeration Service Operations
144
High Pressure Relief Valve
Removal
1. Recover the refrigerant charge.
2. Unscrew and remove the high pressure relief
valve.
Installation
1. Apply a refrigerant Loctite to the threads of
the high pressure relief valve.
2. Install and tighten the high pressure relief
valve.
3. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
4. Recharge the unit with refrigerant and check
the compressor oil.
Receiver Tank
Removal
1. Recover the refrigerant charge.
2. Unsolder the inlet tube from the receiver tank.
3. Unsolder the filter drier line from the receiver
tank outlet tube.
4. Unbolt the mounting brackets and remove the
receiver tank from the unit.
Installation
1. Place the receiver tank in the unit and install
the mounting bolts and nuts loosely. Position
the receiver tank so the sight glass is clearly
visible and the outlet tube lines up.
2. Solder the inlet tube to the receiver tank.
3. Solder the filter drier line to the receiver tank
outlet valve.
4. Tighten the receiver tank mounting hardware
securely.
5. Pressurize the refrigeration system and check
for leaks. If no leaks are found, evacuate the
system.
6. Recharge the unit with refrigerant.
R-404A
The refrigeration industry has introduced a new
refrigerant called R-404A. This refrigeration is
classified as a Hydro-fluorocarbon (HFC) because
it contains hydrogen fluorine and carbon. It does
not contain chlorine.
The capacities of these new refrigerants are
similar for box temperatures above 0 F (-18 C). At
temperatures below 0 F (-18 C), HFC refrigerant
capacities are slightly less than CFC refrigerants.
Unit Identification
Units charged with R-404A are identified by the
following methods:
1. HFC-404A will be stamped on the unit’s serial
plate.
2. “HFC” may be incorporated in the model
designation on the sides of the unit.
3. Decals will be applied to unit as shown below:
Figure 167: R404A Decal
Availability
Refrigerant 404A is available from wholesalers.
The price will depend upon the quantity
purchased. Thirty (30), 50 and 125 containers are
available.
Leak Detection
Leaks can be detected by a electronic leak
detector such as the G.E. H10G or portable leak
detector (see Tool Catalog). See Truck and Trailer
Service Bulletin T&T 048 for additional details.
Summary of Contents for SPECTRUM TS 30 SR NAD
Page 4: ...4 ...
Page 10: ...Table of Contents 10 ...
Page 20: ...Safety Precautions 20 ...
Page 51: ...Unit Description 51 Figure 19 Front View Figure 20 Back View AJA1350 AJA1500 ...
Page 52: ...Unit Description 52 1 On Off Switch Figure 21 Side View 1 ...
Page 60: ...Unit Description 60 ...
Page 80: ...SPECTRUM TS Operation 80 ...
Page 90: ...Electrical Maintenance 90 ...
Page 100: ...Engine Maintenance 100 Figure 130 Early TK 3 95 Fuel and Oil System Components ...
Page 102: ...Engine Maintenance 102 Figure 131 Late TK 3 95 Fuel and Oil System Components ...
Page 104: ...Engine Maintenance 104 Figure 132 TK376 Fuel and Oil System Components ...
Page 136: ...Refrigeration Maintenance 136 ...
Page 156: ...Hilliard Clutch Maintenance 156 ...
Page 158: ...Structural Maintenance 158 ...
Page 168: ...Remote Evaporator Specifications 168 ...
Page 170: ...Remote Evaporator Maintenance Inspection Schedule 170 ...
Page 176: ...Remote Evaporator Electrical Maintenance 176 ...
Page 180: ...Remote Evaporator Refrigeration Service Operations 180 ...
Page 182: ...Remote Evaporator Structural Maintenance 182 ...
Page 184: ...Remote Evaporator System Diagnosis 184 ...
Page 188: ...Wiring and Schematic Diagrams Index 188 ...
Page 189: ...189 Wiring Diagram Page 1 of 4 ...
Page 190: ...190 Wiring Diagram Page 2 of 4 ...
Page 191: ...191 Wiring Diagram Page 3 of 4 ...
Page 192: ...192 Wiring Diagram Page 4 of 4 ...
Page 193: ...193 Schematic Diagram Page 1 of 3 ...
Page 194: ...194 Schematic Diagram Page 2 of 3 ...
Page 195: ...195 Schematic Diagram Page 3 of 3 ...
Page 196: ...196 ...